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Depending on the state of the system, i. A unity gain, differential amplifier is provided for remote CPU die sensing. The voltage on NTC pin is higher than threshold voltage of 1. When the temperature goes down, the NTC thermistor voltage will eventually go up.
ISL6260 PDF Datasheet浏览和下载
ISLC uses RC filter to sense the average voltage on phase node jsl6260 forces the average voltage on the phase node to be equal for current balance. Proper selection and placement of the NTC thermistor allows for detection of a designated temperature rise by the system.
Connect to microprocessor die. Current sensing can be done darasheet either DCR sensing or. Each inductor will have a certain level of DC current flowing through it, this current when multiplied by the DCR of the inductor creates a small DC level of voltage. The selection of Roc is given below in Equation Take DCR current sensing as example, two errors have to be added to find the total current imbalance.
Figure 40 shows the simplified schematic of this approach. We call this gain, G1. Assuming we desire an overcurrent trip level, Ioc, of 55A, and knowing from the Intel Specification that the load line slope, Rdroop is 0.
See Tech Brief TB for details. Do not remove Roc if overcurrent protection is not desired. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which dxtasheet result from its use.
Limits established by characterization and are not production tested.
ISL Datasheet – Multiphase PWM Regulator – Intersil
The required resistance can be calculated by: We recognize that these components form a voltage divider. This allows the RC filter capacitor to discharge when the CPU is at low current, thus providing correct average power information on the capacitor.
Figure 47 shows the simplified model of the droop circuitry. When this voltage is summed with the other channels DC voltages, the total DC load current can be derived.
RS is datasheer through an understanding of both the DC and transient load currents. It is better to have the cap value a little bigger to cover the tolerance of the inductor to prevent the output voltage from going lower than the spec. The external resistance difference in these two conditions is: These resistors will provide voltage feedback in the event that the system is powered up without a processor installed.
For overcurrent less that 2. Therefore, proper NTC thermistor has to be chosen such that 2. A capacitor is added in parallel with RL in order to improve the stability margin of the channel current balance loop.
Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Operating on these large-amplitude, noise-free synthesized signals allows the ISLC to achieve lower output ripple and lower phase jitter than conventional hysteretic and fixed PWM mode controllers. There are two ksl6260 around the inductor of each phase. The reduction in ripple results in fewer components, lower component cost, reduced power dissipation, and smaller implementation area.
The maximum Roc is 30k.
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At low temperature, SW1 is on and SW2 connects to the 1. The following is an example.
Basically, if the max current is 40A, the required droop voltage is 84mV with 2.